Features: The stepper motor dampers are made of high quality brass and rubber material, durable and sturdy. Compatible with most equipment and 3D printers using Nema 17 stepping motor, such as CR-10/CR-10 V2/Ender-3 Pro, etc. 3mm rubber ring between the two brass sheets, which can absorb vibration, so that you have a quiet office environment. Make the motor of 3D printer quiet and reduce resonance, improve 3D printing quality. Equipped with screws of proper size, which is easy to install. Specifications: Dampers- Material: Brass & Rubber Thickness: 6mm M3 Screws- Material: Stainless Steel Size: M3*5mm Package Size: 148 * 102 * 5.9mm / 5.8 * 4.0 * 0.2in Package Weight: 93g / 3.3oz Notes: Because of manual measurement, there may be 1-2cm error. Due to the light and different monitors, the picture may be slightly different from the real color. Packing List: 4 * Stepper Motor Dampers 8 * M3*5mm Screws